Welcome, Lihran! What are your thoughts on the subject, if I may ask?
I was trying to reserve judgement until a further time, when we know more about the characters, but somewhere along the line I turned into a SulxJung shipper (just because they're so darn cute together ... in the present). I don't usually go for the tall dark mysterious bad boy type, but I think that Yoo Jung is neither as sinister as he appears to be in Sul's flashbacks nor as innocent as he's acting in the present. I guess I'm saying that he could turn out to be a normal person with normal motivations but slightly abnormal ways of going about getting what he wants.
Don't really have anything against In Ho, though, aside from his sightly worrying violent side and the fact that he's apparently been a freeloader most of his life (freeloaders don't make for the best boyfriends/husbands). But as for that, he seems to be supporting himself at the present time, so it's probably not a problem.
Happy forumming! is that even a word I don't think it's a word
ETA: Actually I think I can date the beginning of my SulxJung shipping to this scene